Internal-combustion engine.



0. F. LEMBKE.

INTERNAL GOMBUSTION ENGINE. APPLICATION I'ILIBD PEB.6, 1912.

1,076,380. Pfitented' Oct. 21, 1913. R m a 5 no M4 601 fiharl es fiFLembke lllhllT onA-nLns r. LEMIBKE, or vaLrAnAIso, momma.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented @ct. 21,1913.

Application filed February 6, 1912. Serial No. 675,705.

To all whom it may concern.-

Be it known that I, Ci-IAuLns F. LEMBKE, a citizen of the United States, residing at Valparaiso, in the county of Porter and State of Indiana, have invented new and useful Improvements in Internal-Combustion Engines, of which the following is a specifica: tion.

This invention relates to the general structure of an internal combustion engine and more particularly to the valve mechanism and the actuating means therefor and tothc means for controlling the inlet of the fluid medium and the exhaust of the burned gases.

The invention further contemplates a single valve for each cylinder for controlling the admission of the gaseous mixture and the escape of the products of combustion,

said valve automatically taking up wear and being counterbalanced-to a certain degree so as to prevent lateral thrust, particularly during combustion of the explosive mixturc.

The invention consists of the novel features, details of construction and combination of parts, which hereinafter will be more particularly set forth, illustrated in the ac companying drawing, and pointed out in the appended claim.

Referring to the drawings, forming a part of the specification, Figure 1 1s a section of an internal combustion engine embodying the invention. Fig. 2 is a view in elevation of one of the piston valves. Fig. 3 is a section of the valve on the line g g of Fig. 2. Fig. 4 is a sectional view of the cam shaft. Fig. 5 is a front view of a portion of the cam shaft, showing the camin positionthereon and the bell crank coiipcrating therewith.

Corresponding and like parts are referred to in the following description, and indicatcd in all the views of the drawings, by the anic reference characters.

The crank shaft I is mounted in bearings of a suital'ile framework, which in the present instance consists of a crank case 2, the latter havinga sump 3 for receiving a quantity of oil which is applied to the moving parts by a splashing action. The cum shaft (r is arranged parallel with the crank shaft 1' and is mounted in suitable bearings arranged within the crank case. The cam shaft (l is driven from the crank shaft, the latter making two revolutions to each revoor otherwise secured to the crank case andis provided with a jacket 0 forming a space through which the cooling medium, such as water, is circulated: The valve chamber is indicated at 6 and is located at one side of the cylinder and, preferably forms a part thereof. The valve chamber 6- is of cylindrical form and is jacketed so: as to be cooled by means of the i'vater' circulating through the space G. The :water enters the space C at U and leaves said space at A. The exhaust manifold B- has connection with the upper end'of the valve chamber 6. The intake manifold T has connection with the valve chamber 6: at a point intermediate of its ends. The inlet port establishing communication between the manifold T and the valve chamber is indicated at M. The cylinder E has a port 0; near its upper end which establishes communication with the valve chamber. The gaseous mixture entcrs by way of the port 9 and the burned gases leave by way of the same opening.

' A piston F is arranged to operate in the cylinder E and has connection with the crank portion of the crank shaft by means of a pitman l. The spark plug is indicated at R and is located at the upper end of the cylindor.

A valve D is had for the valve chamber and consists of a piston arranged to reciprocute therein, said valve being hollow .and having ports L and N, the port L being adapted to register with the inlet port M and the port N being adapted to register .with the port 0. Anrannular channel 7 is formed in the upper portion of the piston valve and 1s adaptcihto register with the port 0 during compression, "explosion and expansion of the gaseous mixture so as to practically equalizethe pressure on the sides of the valve so that'tbc same may be moved by the expcnditure'bf a. comparatively small amount of force land with a minimum amount of friction. The upper portion of the valve has packing rings, the same locinp; limited above and below or on opposite sides of the annular channel 7, thereby culiexhaust manifold B.

nnm the pressure. By having the valve provided with packing rings such as commonly employed in explosive engines the necessity for grinding valves is wholly obviated and any wear between the valve and its casing is automatically taken up by the expansion of the packing rings. A bell crank J is mounted upon a lug K and one arm is connected by means of a link Y with the valve to be operated. The other arm of the bell crank is bifurcated, each bifurcation being provided with a roller or small wheel 8. The bifurcations of the bell crank eX-- tend upon opposite sides of the cam disk H, with the result that the bell crank is positively rocked in each direction by means of the cam disk, thereby moving the valve in both directions and obviating the use of any springs. The parts are so arranged that when the piston is upon its out-stroke, after being driven inwardly by the expansion of the gases due to explosion, the valve occupies a positionwholly below the port 0 so that the burncd'gases may pass freely from the cylinder into the upper portion of the valve chamber or casing (i, thence into the When the piston is on the instroke to draw in a charge the valve is moved to a position to bring the port N thereof in register with the port 0 and when the piston is on the compressing stroke and on the working stroke, being driven by the expansion of the gases due to combustion, the valve is moved to bring the annular space 7 in register. with the port 0 for the purpose herein stated. The interior of the valve is at all times in communication with the intake manifold and the valve is partly cooled by the surrounding space C through which the water is circulated and by the gaseous mixture which is drawn through the valve.

lhe invention simplifies the general struc ture of engines of the internal combustion type and enables the parts to be materially reduced in number and conserves power,

since no springs are required to operate in conjum-limi with the valves and'it is not necrssary to grind the valves as is essential in the ope alion of explosive engines embodying valves ot the poppet type. The crank case, in which is located the bearings of the cam and crank shafts. also receives the cylinder'and valve chamber and access is readily had thereto by means of a plate S which is made removable and the crank case itself is composed of sections which are bolted together, thereby admit-ting of the parts being readily passed and machined so asto be properly titted to prevent leaky joints.

From the foregoing description, taken in connection with the accompanying drawings, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which theinvcntion 'appertains, and while I have described the principle of operation of the invention, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative, and that such changes may be made when desired as are within the scope of the claim appended hereto.

Having thus described the invention what is claimed as new, is

In an internal combustion cnginc,the combination of a cylinder having a port, a valve chambe' at one side of the cylinder and in communication therewith through said port, said valve chamber having its outer end in communication with the exhaust and having an intakev intermediate of its ends, and a piston valve/arranged to operate in the valve chamber and having an interior space and provided in its sides with openings to register with the intake and with the said cylinder port, said Valve further having an annular channel near its outer end to register with the cylinder port and said alve further having packing rings upon opposite sides of the annular channel.

In testimony whereof latlix my signature in presence of witnesses.

CHARLES F. LEMBKE. lVit-nesses R. C. Jones, H. H. LORING, CLARA AnrnMiLLnnI 

